CN103116128A - Breaker overload testing device and operation method thereof - Google Patents
Breaker overload testing device and operation method thereof Download PDFInfo
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- CN103116128A CN103116128A CN2013100284102A CN201310028410A CN103116128A CN 103116128 A CN103116128 A CN 103116128A CN 2013100284102 A CN2013100284102 A CN 2013100284102A CN 201310028410 A CN201310028410 A CN 201310028410A CN 103116128 A CN103116128 A CN 103116128A
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Abstract
The invention relates to a breaker overload testing device and an operation method thereof and relates to a testing device for circuit breakers. The testing device comprises a control part and an execution part. The control part comprises a single-chip microcomputer, operating software, a current transformer, a high current generator, a current conditioning circuit, a direct-current motor intelligent control circuit, a current conversion ratio intelligent switching circuit, a man-machine interaction circuit and a touch screen, wherein the operating software are stored in the single-chip microcomputer. The execution part comprises an electric voltage regulator and a relay. The operation method of the breaker overload testing device includes: using the single-chip microcomputer as a core to form the control part; acquiring test current passing a breaker in real time by an acquisition program; monitoring current change in real time and performing logical judgment; and when power grid voltage fluctuates or the required test current changes, allowing the single-chip microcomputer to drive the electric voltage regulator to rotate so as to enable the test current of the tested breaker to satisfy test conditions. Therefore, the defects that the test conditions fail to be changed optionally and test accuracy fails to be guaranteed are overcome.
Description
Technical field
Technical scheme of the present invention relates to the proving installation of circuit-breaker, specifically isolating switch overload measurement device and the method for operation thereof.
Background technology
Along with the rapid raising of national economy and living standards of the people, the electrification of industrial enterprise and automaticity improve, and the effect of protection electric appliances is more and more important.Isolating switch just belongs to the protection electric appliances; be mainly used in family expenses and distribution line terminal; when overload or short circuit one class fault occur in consumer; isolating switch can excise fault automatically; play the purpose of protection consumer and personal safety; and the height of its reliability has influence on directly whether low-voltage distribution system can normally be moved and is closely bound up with huge numbers of families' daily life, so the research of isolating switch overload test is generally paid attention to.
In prior art, the project organization more complicated of current overload characteristic detection device for circuit breaker, the development work amount is large, cost is high, and in real time do not show in test process, can not constantly understand the measuring current of overload this moment, and occur to realize regulating in real time the measuring current of transshipping after fluctuation or environment change when line voltage, can cause measuring current and test result inaccurate, this has just greatly affected the accuracy of testing efficiency, speed and test.
Summary of the invention
technical matters to be solved by this invention is: isolating switch overload measurement device and the method for operation thereof are provided, consist of control section take single-chip microcomputer as core, obtain by capture program the measuring current that IMU is crossed isolating switch, the monitor current value changes and carries out the logic judgement at any time, when the measuring current of line voltage appearance fluctuation or requirement changes, monolithic opportunity driven electric voltage regulator is rotated, so that reach by the measuring current of tested isolating switch the requirement that meets test condition, can not arbitrarily change thereby overcome the shortcoming that test condition and test accuracy can not be guaranteed.
the present invention solves this technical problem the technical scheme that adopts: isolating switch overload measurement device, comprise control section and operating part, wherein, control section is made of function software, current transformer, current lifting device, current regulating circuit, direct current motor intelligent control circuit, electric current no-load voltage ratio intelligence commutation circuit, man-machine interaction circuit and the touch-screen of single-chip microcomputer and storage inside thereof, and operating part is made of electric voltage regulator and relay, the connected mode of above-mentioned parts is: by single-chip microcomputer by with the current regulating circuit, current transformer, tested isolating switch, being connected successively of current lifting device and electric voltage regulator forms data acquisition circuit, again by single-chip microcomputer by forming the measuring current circuit for regulating and controlling with being connected successively of direct current motor intelligent control circuit and electric voltage regulator, single-chip microcomputer is connected with touch-screen by the man-machine interaction circuit and forms human-computer interaction module again, electric voltage regulator is arranged again, the current lifting device summation current transformer is connected successively and forms a peripheral circuit for regulating and controlling, in addition, single-chip microcomputer is connected with relay successively with electric current no-load voltage ratio intelligence commutation circuit, so that single-chip microcomputer is by electric current no-load voltage ratio intelligence commutation circuit pilot relay.
Above-mentioned isolating switch overload measurement device, the overall procedure of the function software of described single-chip microcomputer storage inside is: does beginning → initialization → setting measuring current → data acquisition → current actual value satisfy accuracy requirement? → be the overload characteristics of test both opens device; Is no, direct current motor intelligence transferred, and makes actual value satisfy the overload characteristics of accuracy requirement → test both opens device, and intelligent flow stabilizing → have circuit breaker tripping? → be that recording test time starts bypass and continues other isolating switchs of test, and intelligent flow stabilizing; No, continue test, and stop in intelligent flow stabilizing → stipulated time testing → returning.
If above-mentioned isolating switch overload measurement device is the mimic channel that described current regulating main circuit is comprised of current transformer TA1905, filtering circuit and reference voltage source circuit.
Above-mentioned isolating switch overload measurement device, the mimic channel that described electric current no-load voltage ratio intelligence commutation circuit mainly is comprised of TLP521 type photoelectrical coupler, triode 8050 and power relay HG4231.
Above-mentioned isolating switch overload measurement device, the use external power supply provides needed electric energy for single-chip microcomputer and other circuit wherein.
Above-mentioned isolating switch overload measurement device, related parts and components and parts are all that those skilled in the art know and can be commercially available, and the connected mode of circuit is that those skilled in the art can grasp.
the method of operation of above-mentioned isolating switch overload measurement device is: the input of AC220V as electric voltage regulator, through electric voltage regulator regulation output voltage, produce overload current through current lifting device again, be used for isolating switch is carried out overload test, utilize simultaneously current transformer to make overload current be transformed into the accessible electric current of mimic channel, through the current regulating circuit, current signal is become the burning voltage signal through processing again, single-chip microcomputer is handled as follows the voltage signal of input: single-chip microcomputer utilizes the A/D translation function that itself carries to adopt the constant duration of 500 μ s to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value, then use fourier algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences, single-chip microcomputer obtains this moment by the actual current value of isolating switch by collecting voltage effective value recycling corresponding relation simultaneously, thereby realize that single-chip microcomputer is to the Real Time Monitoring of main circuit current, when fluctuation occurs in extraneous current value or need the different current value of test, can regulate the electric current by tested isolating switch at any time by electric voltage regulator, make device have all the time stable in test process and meet the measuring current that purpose requires, when the measuring current amplitude of variation in the external world was larger, single-chip microcomputer can be enabled electric current no-load voltage ratio intelligence handoff functionality automatically, the scope that the voltage effective value that collects is remained at can regulate and control, can be on touch-screen in the process of whole test show in real time current value and time parameter, and touch-screen can be realized the timing Presentation Function, to the query function of historical data with to the modify feature of measuring current.
The method of operation of above-mentioned isolating switch overload measurement device, its test process is:
The first step, after powering on, controller general register and special register are carried out initialization, comprising the initialization of timer module, A/D modular converter and width modulation functional module, and the initialization of touch screen control module and LCD MODULE, after completing, initialization turns second step;
Second step, the input function by touch-screen is set the measuring current of tested isolating switch, turns after setting completed for the 3rd step;
The 3rd step, this moment, single-chip microcomputer can the value of adopting, obtain the actual current value by tested isolating switch, if the measuring current value of the tested isolating switch of setting of this actual current value and second step is different, carry out intelligence by the Micro Controller Unit (MCU) driving electric voltage regulator and transfer, turned for the 4th step after satisfying accuracy requirement;
The 4th step, carry out the overload characteristics test of tested isolating switch this moment, in test process, single-chip microcomputer can detect the actual current value by tested isolating switch at any time, when the measuring current value with the tested isolating switch of setting of second step deviation occurs and exceeds accuracy requirement, can be undertaken regulating to guard against deviations in real time by direct current motor intelligent control circuit, when tested circuit breaker tripping is arranged, can record the test duration of this tested isolating switch, and start other tested isolating switch of bypass circuit continuation test, turned for the 5th step;
The 5th step, stop the test of overload characteristics at official hour, and in the process of whole test, touch-screen all can show actual current value and the test duration by tested isolating switch in real time, and can input the measuring current value of the different tested isolating switchs of setting by touch-screen, reach the purpose of intelligence test.
The invention has the beneficial effects as follows: compared with prior art advantage of the present invention is as follows:
(1) isolating switch overload measurement device of the present invention and the method for operation thereof have realized the Real-Time Monitoring to the measuring current value of passing through isolating switch, have guaranteed the accuracy of test.
(2) isolating switch overload measurement device of the present invention and the method for operation thereof after measuring current fluctuates, are transferred by the intelligence of electric voltage regulator and are quick and precisely obtained the purpose electric current.The present invention is take single-chip microcomputer as core, touch-screen has touch and real-time Presentation Function, can set at any time the current value of test by touch-screen, and can see on touch-screen and set result and the actual current value of this moment by isolating switch, and show the test duration, facilitated the monitoring of tester to the overload characteristics test case of isolating switch.
(3) isolating switch overload measurement device of the present invention and the method for operation thereof, has electric current no-load voltage ratio intelligence handoff functionality, when the current value amplitude of variation of testing is very large, isolating switch overload measurement device can automatic setting different electric current no-load voltage ratios, the scope that data effective value that single-chip microcomputer collects is remained at can regulate and control.
(4) isolating switch overload measurement device of the present invention and the method for operation thereof, can carry out simultaneously the test of overload characteristics to a plurality of tested isolating switchs, when wherein some tested isolating switchs occur to thread off, can automatically start bypass circuit, can not affect the continuation test of other tested isolating switch, until the test duration of regulation.
In a word, isolating switch overload measurement device of the present invention and the method for operation thereof, consist of control section take single-chip microcomputer as core, obtain by capture program the measuring current that IMU is crossed isolating switch, the monitor current value changes and carries out the logic judgement at any time, when the measuring current of line voltage appearance fluctuation or requirement changes, monolithic opportunity driven electric voltage regulator is rotated, so that reach by the measuring current of tested isolating switch the requirement that meets test condition, can not arbitrarily change thereby overcome the shortcoming that test condition and test accuracy can not be guaranteed.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is isolating switch overload measurement installation composition schematic block diagram of the present invention.
Fig. 2 is the connected mode schematic diagram of isolating switch overload measurement device component part of the present invention.
Fig. 3 is the current regulating circuit theory diagrams in isolating switch overload measurement device of the present invention.
Fig. 4 is that the direct current motor intelligence in isolating switch overload measurement device of the present invention is transferred circuit theory diagrams.
Fig. 5 is the electric current no-load voltage ratio intelligence commutation circuit schematic diagram in isolating switch overload measurement device of the present invention.
Fig. 6 is the man-machine interaction circuit theory diagrams in isolating switch overload measurement device of the present invention.
Fig. 7 is the function software overview flow chart of the method for operation of isolating switch overload measurement device of the present invention.
Fig. 8 is the process flow diagram of the direct current motor intelligent control circuit in the method for operation of isolating switch overload measurement device of the present invention.
Embodiment
Embodiment illustrated in fig. 1 showing, isolating switch overload measurement device of the present invention comprises control section and operating part, wherein, control section is made of single-chip microcomputer, current transformer, current lifting device, current regulating circuit, direct current motor intelligent control circuit, electric current no-load voltage ratio intelligence commutation circuit, touch-screen and man-machine interaction circuit, and operating part is made of electric voltage regulator and relay.
embodiment illustrated in fig. 2 showing, the connected mode of isolating switch overload measurement device component part of the present invention is, by single-chip microcomputer by with the current regulating circuit, current transformer, tested isolating switch, being connected successively of current lifting device and electric voltage regulator forms data acquisition circuit, again by single-chip microcomputer by forming the measuring current circuit for regulating and controlling with being connected successively of direct current motor intelligent control circuit and electric voltage regulator, single-chip microcomputer is connected with touch-screen and forms a so-called man-machine interaction circuit again, electric voltage regulator is arranged again, the current lifting device summation current transformer is connected successively and forms a peripheral circuit for regulating and controlling, in addition, single-chip microcomputer is connected with relay successively with electric current no-load voltage ratio intelligence commutation circuit, so that single-chip microcomputer is by electric current no-load voltage ratio intelligence commutation circuit pilot relay.
the principle of the current regulating circuit in demonstration embodiment illustrated in fig. 3 isolating switch overload measurement of the present invention device is: the measuring current of wherein testing tested isolating switch is transformed into the manageable current signal of single-chip microcomputer through after current transformer, the built-in small-sized AC current transformer TA1905-04 of current signal access bus with conversion, this current transformer machinery and environmental resistance are good, voltage isolation capabilities is strong, specified I/O electric current is 5A/1.25mA, pass through again amplifier, after the filtering of resistance and electric capacity and optimization, be transformed into stable voltage sinusoidal wave, RA1 port through single-chip microcomputer carries out the AD value of adopting, adopt fourier algorithm to calculate effective value, and can pass through a corresponding relation, amount to and obtain this moment by the measuring current value of isolating switch, reach the real time monitoring function of measuring current to external world.In this circuit design, adopted accurate 2.5V reference voltage source LM336, reference voltage source is the very important ingredient of contemporary Analogous Integrated Electronic Circuits, for serial voltage regulation circuit, A/D and D/A converter provide reference voltage, is also voltage stabilizing power supply or the driving source of most of sensors.In addition, reference voltage source also can be used as scale merit and the Precision Current Component of standard cell, instrument gauge outfit, occupies very consequence in Analogous Integrated Electronic Circuits, and it directly affects performance and the precision of electronic system, has guaranteed to a greater extent the precision of conversion.
Direct current motor intelligence in demonstration embodiment illustrated in fig. 4 isolating switch overload measurement of the present invention device is transferred circuit theory and is: the purpose of this circuit is when fluctuation occurs the measuring current by tested isolating switch or need change purpose electric current, can carry out the intelligence transfer of electric current by this circuit, make the measuring current value by tested isolating switch reach fast and accurately requirement.The 15th, 16,17 pins of singlechip chip PIC16F877 are connected with the 7th, 6,5 pins of L298 respectively, and the width modulation function of the CCP module by PIC16F877 is sent PWM ripple signal and realized that the intelligence of direct current motor transfers.Four fast recovery diodes have been placed at design direct current motor two ends in this direct current motor intelligence is transferred circuit, can improve running stability and the protection drive amplification integrated circuit of direct current generator, and whole design is had very large effect.
electric current no-load voltage ratio intelligence commutation circuit principle in demonstration embodiment illustrated in fig. 5 isolating switch overload measurement of the present invention device is: this electric current no-load voltage ratio intelligence commutation circuit is mainly by TLP521 type photoelectrical coupler, the mimic channel of triode 8050 and power relay HG4231 composition is because the model of tested isolating switch is different, its measuring current is also relatively different, and we need to accurately obtain the measuring current value by tested isolating switch, in external circuit, the test specification of reometer can not change along with the difference of tested isolating switch measuring current scope, so electric current no-load voltage ratio intelligence commutation circuit is extremely important.When larger variation occured the measuring current in the external world, single-chip microcomputer can be given signal of this circuit, and can switch to most suitable no-load voltage ratio this moment according to actual conditions.In this circuit design, TLP521-1 type photoelectrical coupler, triode 8050 and power relay HG4231 have been used, photoelectrical coupler is the basic device of realizing photoelectric coupling, realized the electrical isolation of input and output two parts circuit, make it front end and load is isolated fully, thereby can effectively suppress electrical interference, increase security, simplify circuit design.Power relay HG4231 is the automatic switch element with isolation features, be widely used in remote control, communication, control automatically, electromechanical integration and power electronic equipment, it is the topworks to the controlled circuit output " leads to ", " breaking " controlled, and be between the importation and output of relay, pair input quantity be coupled isolation, function treatment and to the intermediary agency that output drives are arranged, realized the safe on-off function of this electric current no-load voltage ratio intelligence commutation circuit and reduced the circuit design difficulty.
Man-machine interaction circuit theory in demonstration embodiment illustrated in fig. 6 isolating switch overload measurement of the present invention device is: make single-chip microcomputer be connected with touch-screen by this man-machine interaction circuit.That select in this circuit is resistive touch screen OCMJ15X20D, analogue-to-digital converters and several analog switches of one 10 are contained in OCMJ15X20D Chinese fonts lcd module inside, can directly be connected with XL, XR, YU, the YD of four-wire resistance type contact type panel.When the touch location of reality is determined, at first switch by analog switch and allow analogue-to-digital converters read ohmically magnitude of voltage, then read the conversion value of analogue-to-digital converters by single-chip microcomputer, the position that obtains being touched by analyzing and processing.Resistive touch screen has to external world the working environment of isolation fully, is not afraid of dust, steam and greasy dirt, can touch with any object, can be used for the drawing of writing, and its screen and control system all more cheap, reaction sensitivity is also fine.Select touch-screen can make the operating personnel of isolating switch overload measurement device of the present invention inquire about quickly and easily current value, time value and current setting is inputted and revised.When test both opens device overload characteristics, show in real time current value and the time value of main circuit.
Embodiment illustrated in fig. 7 showing, does the function software overall procedure of the method for operation of isolating switch overload measurement device of the present invention is: beginning → initialization → setting measuring current → data acquisition → current actual value satisfy accuracy requirement? → be the overload characteristics of test both opens device; Is no, direct current motor intelligence transferred, and makes actual value satisfy the overload characteristics of accuracy requirement → test both opens device, and intelligent flow stabilizing → have circuit breaker tripping? → be that recording test time starts bypass and continues other isolating switchs of test, and intelligent flow stabilizing; No, continue test, and stop in intelligent flow stabilizing → stipulated time testing → returning.
Embodiment illustrated in fig. 8 showing, does direct current motor intelligent control circuit flow process in the method for operation of isolating switch overload measurement device of the present invention is: beginning → I/O port initialization → CCP module initialization → setting measuring current → AD value of adopting → current actual value satisfy accuracy requirement? → be, stop transferring stream, and intelligent flow stabilizing → return; No, are current actual value and test value relatively? → satisfy accuracy requirement, stop transferring stream, and intelligent flow stabilizing → return; Greatly, direct current motor counter-rotating makes actual value satisfy accuracy requirement → return; Little, the direct current motor forward makes actual value satisfy accuracy requirement → stop and transferring stream, and intelligent flow stabilizing → return.
Consist of the isolating switch overload measurement device of the present embodiment according to Fig. 2,3,4,5 and 6 illustrated embodiments, the function software that deposits single-chip microcomputer in has function software overall procedure shown in Figure 7.
the method of operation of the isolating switch overload measurement device of the present embodiment, namely the method for operation with the isolating switch overload measurement device to test circuit breaker overload characteristic of the present embodiment is: the input of AC220V as electric voltage regulator, through electric voltage regulator regulation output voltage, produce overload current through current lifting device again, be used for isolating switch is carried out overload test, utilize simultaneously current transformer to make overload current be transformed into the accessible electric current of mimic channel, through the current regulating circuit, current signal is become the burning voltage signal through processing again, single-chip microcomputer is handled as follows the voltage signal of input: single-chip microcomputer utilizes the A/D translation function that itself carries to adopt the constant duration of 500 μ s to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value, then use fourier algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences, single-chip microcomputer obtains this moment by the actual current value of isolating switch by collecting voltage effective value recycling corresponding relation simultaneously, thereby realize that single-chip microcomputer is to the Real Time Monitoring of main circuit current, when fluctuation occurs in extraneous current value or need the different current value of test, can regulate the electric current by tested isolating switch at any time by electric voltage regulator, make device have all the time stable in test process and meet the measuring current that purpose requires, when the measuring current amplitude of variation in the external world was larger, single-chip microcomputer can be enabled electric current no-load voltage ratio intelligence handoff functionality automatically, the scope that the voltage effective value that collects is remained at can regulate and control, can be on touch-screen in the process of whole test show in real time current value and time parameter, and touch-screen can be realized the timing Presentation Function, to the query function of historical data with to the modify feature of measuring current.
The test process of the method for operation of the isolating switch overload measurement device of the present embodiment is:
The first step, after powering on, controller general register and special register are carried out initialization, comprising the initialization of timer module, A/D modular converter and width modulation functional module, and the initialization of touch screen control module and LCD MODULE, after completing, initialization turns second step;
Second step, the input function by touch-screen is set the measuring current of tested isolating switch, turns after setting completed for the 3rd step;
The 3rd step, this moment, single-chip microcomputer can the value of adopting, obtain the actual current value by tested isolating switch, if the measuring current value of the tested isolating switch of setting of this actual current value and second step is different, carry out intelligence by the Micro Controller Unit (MCU) driving electric voltage regulator and transfer, turned for the 4th step after satisfying accuracy requirement;
The 4th step, carry out the overload characteristics test of tested isolating switch this moment, in test process, single-chip microcomputer can detect the actual current value by tested isolating switch at any time, when the measuring current value with the tested isolating switch of setting of second step deviation occurs and exceeds accuracy requirement, can be undertaken regulating to guard against deviations in real time by direct current motor intelligent control circuit, when tested circuit breaker tripping is arranged, can record the test duration of this tested isolating switch, and start other tested isolating switch of bypass circuit continuation test, turned for the 5th step;
The 5th step, stop the test of overload characteristics at official hour, and in the process of whole test, touch-screen all can show actual current value and the test duration by tested isolating switch in real time, and can input the measuring current value of the different tested isolating switchs of setting by touch-screen, reach the purpose of intelligence test.
Operating process with the overload characteristics of the miniature circuit breaker of many DZ47-63/C10 types of isolating switch overload measurement device to test of the present embodiment is:
The first step connects all devices and equipment, and detects energising safety, and the miniature circuit breaker of many DZ47-63/C10 types that will be tested is arranged on test position, namely between the current lifting device summation current transformer, prepares to carry out the overload characteristics test, forwards second step to;
Second step, the isolating switch overload measurement device of the present embodiment is started, can show above-mentioned tested miniature circuit breaker overload current and the initial set value of test duration on touch-screen this moment, now just can set by the input function of touch-screen, this moment, the overload current value of input was followed successively by 11.3A, 14.5A and 25.5A, and being respectively 1 hour in the test duration of 11.3A and 14.5A, is 60 seconds in the test duration of 25.5A, forwards for the 3rd step after completing to;
The 3rd step began test, and in whole test process, the isolating switch overload measurement device of the present embodiment can be adjusted overload current in real time, makes it meet the test purpose requirement.If in above-mentioned a plurality of tested miniature circuit breaker, a dropout is arranged, can start bypass circuit this moment, with this dropout isolating switch bypass, do not affect above-mentioned other do not thread off tested miniature circuit breaker proceed the test, and numbering and the drop-away time of the tested miniature circuit breaker of record dropout, so that with post analysis.When measuring current was 11.3A, wherein 1 tested miniature circuit breaker was threaded off at 32 minutes and 16 seconds, and was defective, and bypass start-up continues test, has reached the purpose of intelligence test.
Claims (6)
1. isolating switch overload measurement device, it is characterized in that: comprise control section and operating part, wherein, control section is made of function software, current transformer, current lifting device, current regulating circuit, direct current motor intelligent control circuit, electric current no-load voltage ratio intelligence commutation circuit, man-machine interaction circuit and the touch-screen of single-chip microcomputer and storage inside thereof, and operating part is made of electric voltage regulator and relay, the connected mode of above-mentioned parts is: by single-chip microcomputer by with the current regulating circuit, current transformer, tested isolating switch, being connected successively of current lifting device and electric voltage regulator forms data acquisition circuit, again by single-chip microcomputer by forming the measuring current circuit for regulating and controlling with being connected successively of direct current motor intelligent control circuit and electric voltage regulator, single-chip microcomputer is connected with touch-screen by the man-machine interaction circuit and forms human-computer interaction module again, electric voltage regulator is arranged again, the current lifting device summation current transformer is connected successively and forms a peripheral circuit for regulating and controlling, in addition, single-chip microcomputer is connected with relay successively with electric current no-load voltage ratio intelligence commutation circuit, so that single-chip microcomputer is by electric current no-load voltage ratio intelligence commutation circuit pilot relay.
2. said isolating switch overload measurement device according to claim 1, does it is characterized in that: the overall procedure of the function software of described single-chip microcomputer storage inside is: beginning → initialization → setting measuring current → data acquisition → current actual value satisfy accuracy requirement? → be the overload characteristics of test both opens device; Is no, direct current motor intelligence transferred, and makes actual value satisfy the overload characteristics of accuracy requirement → test both opens device, and intelligent flow stabilizing → have circuit breaker tripping? → be that recording test time starts bypass and continues other isolating switchs of test, and intelligent flow stabilizing; No, continue test, and stop in intelligent flow stabilizing → stipulated time testing → returning.
3. said isolating switch overload measurement device according to claim 1, is characterized in that: if the mimic channel that described current regulating main circuit is comprised of current transformer TA1905, filtering circuit and reference voltage source circuit.
4. said isolating switch overload measurement device according to claim 1, is characterized in that: the mimic channel that described electric current no-load voltage ratio intelligence commutation circuit mainly is comprised of TLP521 type photoelectrical coupler, triode 8050 and power relay HG4231.
5. the method for operation of the said isolating switch overload measurement of claim 1 device, it is characterized in that: the input of AC220V as electric voltage regulator, through electric voltage regulator regulation output voltage, produce overload current through current lifting device again, be used for isolating switch is carried out overload test, utilize simultaneously current transformer to make overload current be transformed into the accessible electric current of mimic channel, through the current regulating circuit, current signal is become the burning voltage signal through processing again, single-chip microcomputer is handled as follows the voltage signal of input: single-chip microcomputer utilizes the A/D translation function that itself carries to adopt the constant duration of 500 μ S to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value, then use fourier algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences, single-chip microcomputer obtains this moment by the actual current value of isolating switch by collecting voltage effective value recycling corresponding relation simultaneously, thereby realize that single-chip microcomputer is to the Real Time Monitoring of main circuit current, when fluctuation occurs in extraneous current value or need the different current value of test, can regulate the electric current by tested isolating switch at any time by electric voltage regulator, make device have all the time stable in test process and meet the measuring current that purpose requires, when the measuring current amplitude of variation in the external world was larger, single-chip microcomputer can be enabled electric current no-load voltage ratio intelligence handoff functionality automatically, the scope that the voltage effective value that collects is remained at can regulate and control, can be on touch-screen in the process of whole test show in real time current value and time parameter, and touch-screen can be realized the timing Presentation Function, to the query function of historical data with to the modify feature of measuring current.
6. the method for operation of said isolating switch overload measurement device according to claim 5, it is characterized in that: its test process is:
The first step, after powering on, controller general register and special register are carried out initialization, comprising the initialization of timer module, A/D modular converter and width modulation functional module, and the initialization of touch screen control module and LCD MODULE, after completing, initialization turns second step;
Second step, the input function by touch-screen is set the measuring current of tested isolating switch, turns after setting completed for the 3rd step;
The 3rd step, this moment, single-chip microcomputer can the value of adopting, obtain the actual current value by tested isolating switch, if the measuring current value of the tested isolating switch of setting of this actual current value and second step is different, carry out intelligence by the Micro Controller Unit (MCU) driving electric voltage regulator and transfer, turned for the 4th step after satisfying accuracy requirement;
The 4th step, carry out the overload characteristics test of tested isolating switch this moment, in test process, single-chip microcomputer can detect the actual current value by tested isolating switch at any time, when the measuring current value with the tested isolating switch of setting of second step deviation occurs and exceeds accuracy requirement, can be undertaken regulating to guard against deviations in real time by direct current motor intelligent control circuit, when tested circuit breaker tripping is arranged, can record the test duration of this tested isolating switch, and start other tested isolating switch of bypass circuit continuation test, turned for the 5th step;
The 5th step, stop the test of overload characteristics at official hour, and in the process of whole test, touch-screen all can show actual current value and the test duration by tested isolating switch in real time, and can input the measuring current value of the different tested isolating switchs of setting by touch-screen, reach the purpose of intelligence test.
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| CN105741654A (en) * | 2015-11-20 | 2016-07-06 | 北京理工大学 | Air circuit breaker teaching experiment demonstrating device |
| CN106597140A (en) * | 2016-08-30 | 2017-04-26 | 中山市开普电器有限公司 | Earth leakage protection device overload testing device |
| CN107192942A (en) * | 2017-05-11 | 2017-09-22 | 广西云涌科技有限公司 | It is a kind of portable to take the external breaker entry detection means of control electric energy meter |
| CN108152725A (en) * | 2017-12-14 | 2018-06-12 | 国网宁夏电力有限公司电力科学研究院 | A kind of electric switch Interruption experimental rig |
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| CN112113018A (en) * | 2019-06-22 | 2020-12-22 | 无锡水表有限责任公司 | Scheme for opening and closing electromechanical integrated water meter valve |
| CN111505364A (en) * | 2020-04-25 | 2020-08-07 | 搜派师自动化科技有限公司 | Intelligent variable-frequency electric actuating mechanism capable of being used for high-intensity magnetic field and diamagnetic method |
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